def CreateVolume(self, request, context):
pvsize = request.capacity_range.required_bytes
# TODO: Check the available space under lock
host_volumes = get_pv_hosting_volumes()
hostvol = ""
for hvol in host_volumes:
mntdir = os.path.join(HOSTVOL_MOUNTDIR, hvol)
# Try to mount the Host Volume, handle failure if already mounted
mount_glusterfs(hvol, mntdir)
if is_space_available(mntdir, pvsize):
hostvol = hvol
break
if hostvol == "":
raise Exception("no Hosting Volumes available, add more storage")
pvtype = PV_TYPE_SUBVOL
for vol_capability in request.volume_capabilities:
# using getattr to avoid Pylint error
single_node_writer = getattr(csi_pb2.VolumeCapability.AccessMode,
"SINGLE_NODE_WRITER")
if vol_capability.access_mode.mode == single_node_writer:
pvtype = PV_TYPE_VIRTBLOCK
volpath = os.path.join(HOSTVOL_MOUNTDIR, hostvol, pvtype, request.name)
if pvtype == PV_TYPE_VIRTBLOCK:
# Create a file with required size
os.makedirs(os.path.dirname(volpath), exist_ok=True)
volpath_fd = os.open(volpath, os.O_CREAT | os.O_RDWR)
os.close(volpath_fd)
os.truncate(volpath, pvsize)
# TODO: Multiple FS support based on volume_capability mount option
execute(MKFS_XFS_CMD, volpath)
else:
# Create a subdir
os.makedirs(volpath)
# TODO: Set BackendQuota using RPC to sidecar
# container of each glusterfsd pod
return csi_pb2.CreateVolumeResponse(
volume={
"volume_id": request.name,
"capacity_bytes": pvsize,
"volume_context": {
"hostvol": hostvol,
"pvtype": pvtype,
"fstype": "xfs"
}
})
def DeleteVolume(self, request, context):
hostvol = request.volume_context.get("hostvol", "")
mntdir = os.path.join(HOSTVOL_MOUNTDIR, hostvol)
# Try to mount the Host Volume, handle
# failure if already mounted
mount_glusterfs(hostvol, mntdir)
# TODO: get pvtype from storage class
pvtype = request.volume_context.get("pvtype", "")
volpath = os.path.join(mntdir, pvtype, request.name)
if pvtype == PV_TYPE_VIRTBLOCK:
os.remove(volpath)
else:
os.removedirs(volpath)
return csi_pb2.DeleteVolumeResponse()
def NodePublishVolume(self, request, context):
volume = request.volume_context.get("hostvol", "")
mntdir = os.path.join(HOSTVOL_MOUNTDIR, volume)
# Try to mount the Host Volume, handle failure if already mounted
mount_glusterfs(volume, mntdir)
# Mount the PV
pvtype = request.volume_context.get("pvtype", "")
pvpath = os.path.join(mntdir, pvtype, request.volume_id)
# TODO: Handle Volume capability mount flags
if pvtype == PV_TYPE_VIRTBLOCK:
execute(MOUNT_CMD, "-t",
request.volume_context.get("fstype", "xfs"), pvpath,
request.target_path)
else: # pv type is subdir
execute(MOUNT_CMD, "--bind", pvpath, request.target_path)
return csi_pb2.NodePublishVolumeResponse()